#ifndef KISS_FTR_H
#define KISS_FTR_H

#include "kiss_fft.h"
#ifdef __cplusplus
extern "C" {
#endif

  // Real optimized version can save about 45% cpu time vs. complex fft 
  // of a real seq.

typedef struct kiss_fftr_state *kiss_fftr_cfg;

kiss_fftr_cfg kiss_fftr_alloc(int nfft, int inverse_fft, void * mem, 
			      size_t * lenmem);
  // nfft must be even!
  // If you don't care to allocate space, use mem = lenmem = NULL 

void kiss_fftr(kiss_fftr_cfg cfg, const kiss_fft_scalar *timedata,
	       kiss_fft_cpx *freqdata);

  // input timedata has nfft scalar points
  // output freqdata has nfft/2+1 complex points

void kiss_fftri(kiss_fftr_cfg cfg, const kiss_fft_cpx *freqdata,
		kiss_fft_scalar *timedata);
  // input freqdata has  nfft/2+1 complex points
  // output timedata has nfft scalar points

#define kiss_fftr_free free

#ifdef __cplusplus
}
#endif
#endif
